Swollen feet after a sunburn many years ago

When I was 26, I got a severe sunburn on my feet.  Later that day, they started swelling and got small red “pinprick” size spots; no blisters.  They swelled so big, I could barely wear flip-flops.  My doctor back then gave me hydrochlorothiazide (I believe 25 mg).  The swelling went down.  When I turned 29, they started swelling again, with no apparent cause/reason.  My current doctor says it is pitting edema and has added 5 mg of lisinopril.  This only temporally fixes the swelling.  I have also tried compression stockings and elevating them, but that doesn’t really help either.  Because of the sunburn, the skin is very sensitive to sunlight (they feel like they are sizzling) and the red “pinpricks” return periodically.  It is also painful to wear shoes all day because my feet get hot and that makes them hurt as well.
They are very stiff feeling and painful when they swell.  I am also getting small groups of spider veins on my feet and near my ankles.  Sometimes there will just be a small puffy area (about the size of an apricot) near my ankles.  On a side note, I recently dropped a can of soda on one of my feet and now it swells more than the other one (my doctor doesn’t seem to be worried about that, but I think it is a problem).
I am now 30 and getting tired of having this happen; it’s painful and looks gross.  They doctors I have seen don’t seem to take my concerns seriously.  They simply say there is nothing they can do.  I am in relatively good health.  I am 5’10” and 160 lbs.  My blood-pressure is naturally low. I also take 112 mg of levothyroxine.  I also only take the hydrochlorothiazide and lisinopril (separately) when the swelling occurs.  Thank you